Desc: Its a Girl Thing: MKA and the Explosion of the Girls Tween Market: Directed by Shannon Silva. With Liz Wilson, Emily Lievre. Using expert interviews, historical research, animated reenactments and found footage, this feature length documentary looks closely, and critically, at the tween markets evolution and the role of Dualstar (Mary Kate and Ashley Olsen's company) in the markets explosion. Interviews with Jean Kilbourne, Gail Dines, Sharon Lamb, Terrill Bravender, Lisa Machoian, Diane Levin, Susan Linn, plus various mothers, teachers, tweens and MKA fans highlight the impact Mary Kate and Ashley Olsen have had on the girls tween market since they first hit the scene in 1987.